US Bridges

S Four Mile Lane over South Four Mile Creek

Fair

Coos County, Oregon · 0113 E JCT CO 98 ST 101 · Structure no. 11C99 009900002

Built
1983
42 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
57 ft
1 main span
Daily traffic
39
2020 count
Owner
County
County Highway Agency

About this bridge

S Four Mile Lane over South Four Mile Creek is a prestressed concrete slab carrying S Four Mile Lane over South Four Mile Creek in Coos County, Oregon. It was built in 1983, so it is 42 years old, younger than the Oregon average of 49.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 39 vehicles a day, roughly 1% of them trucks, projected to reach 44 by 2025. The structure is 57 ft (17.4 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesS Four Mile Lane
CrossesSouth Four Mile Creek
Location0113 E JCT CO 98 ST 101
RouteCounty Highway C099G
StateOregon
Coordinates43.00028, -124.39648
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.1 US tons
Inventory rating47.2 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span55 ft (16.8 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2020)
Projected traffic44 by 2025
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S Four Mile Lane over South Four Mile Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is S Four Mile Lane over South Four Mile Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does S Four Mile Lane over South Four Mile Creek carry?

About 39 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is S Four Mile Lane over South Four Mile Creek?

The structure is 57 ft (17.4 m) long with a longest span of 55 ft (16.8 m) and a deck 20 ft wide.

Who owns S Four Mile Lane over South Four Mile Creek?

It is owned by the County Highway Agency.